using System;
using System.Text;
using System.Text.RegularExpressions;

namespace ConsoleApp52
{
    class Program
    {
        static void Main(string[] args)
        {
            int key = int.Parse(Console.ReadLine());
            string text = string.Empty;
            StringBuilder decryptedText = new StringBuilder();
            while ((text = Console.ReadLine()) != "end")
            {
                for (int i = 0; i < text.Length; i++)
                {
                    decryptedText.Append((char)((int)text[i] - key));
                }
            }
                string pattern = @"(?<name>(?<=@)[A-Za-z]+)[^@\-!:>]*.(?<behaviour>(?<=!)[G](?=!))";
                MatchCollection names = Regex.Matches(decryptedText.ToString(), pattern);
                foreach(Match name in names)
                {
                    string validName = name.Groups["name"].Value;
                    Console.WriteLine($"{validName}");
                }

            }
        }
    }